/Engine/Plugins/FX/Niagara/Source/Niagara/Public/NiagaraComponent.h
Sets the custom time dilation value for the component. Note: This is only available on components that are in solo mode currently.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category=Niagara) void SetCustomTimeDilation ( float Dilation )